Are you using the incognito button for new DMs in Amethyst? It also doesn't help if someone DMs you via legacy DMs either. These clients support old methods for clients that haven't upgraded their DMs yet for backwards compatibility. 

 No. I have zero clue what you're talking about. This is a UI failure, plus, a protocol failure at this point. 🙄 

 Protocols get upgraded often. Clients need to adopt the changes.